B2791

DTC B2791 Communication Condition Failure between ECM

DESCRIPTION

DTC Detection Condition:

This DTC is output when the ID code box does not respond to a verification request signal from the ECM.

HINT:
- If the engine switch is turned off immediately after an engine start, this DTC is also detected.
- If this DTC is detected simultaneously with DTC B2799, troubleshoot DTC B2799 first.

Wiring Diagram:

Step 1:

Step 1(Continued):

INSPECTION PROCEDURE

NOTE:
- If the ID code box is replaced, register the key and ECU communication ID.
- If the ECM is replaced, register the ECU communication ID.
- If the engine can be started even when DTC B2791 is output, the ID code box can be considered normal. Be sure to recheck for DTCs after clearing the DTCs.